:root {
  color-scheme: light;
  --ink: #17211f;
  --muted: #586562;
  --paper: #ffffff;
  --soft: #f2f6f3;
  --line: #d8e1dc;
  --green: #087b4d;
  --green-dark: #055936;
  --teal: #087c88;
  --amber: #a65f00;
  --night: #081714;
  --max: 1120px;
}

html.dark {
  color-scheme: dark;
  --ink: #edf6f2;
  --muted: #aec0b8;
  --paper: #08130f;
  --soft: #10231b;
  --line: #29463a;
  --green: #6add94;
  --green-dark: #91e9ae;
  --teal: #72d9df;
  --amber: #ffc56e;
  --night: #050b08;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans TC", "Microsoft JhengHei", "PingFang TC", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.85;
}
a { color: var(--green); }
a:hover { color: var(--green-dark); }
img { max-width: 100%; height: auto; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}
.skip-link:focus {
  left: 16px;
  top: 12px;
  z-index: 100;
  padding: 8px 12px;
  color: #fff;
  background: var(--green-dark);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(14px);
}
html.dark .site-header { background: rgba(8,19,15,.96); }
.header-inner {
  width: min(var(--max), calc(100% - 40px));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 1.1rem;
  font-weight: 900;
  text-decoration: none;
}
.brand img { width: 40px; height: 40px; border-radius: 50%; }
.nav { display: flex; align-items: center; gap: 22px; }
.nav a { color: var(--ink); font-size: .92rem; font-weight: 700; text-decoration: none; }
.nav a:hover { color: var(--green); }
.nav .nav-action {
  padding: 8px 14px;
  color: #fff;
  background: var(--green);
  border-radius: 6px;
}
.nav .nav-action:hover { color: #fff; background: var(--green-dark); }

.article-controls {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.article-lang-switch {
  display: inline-flex;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
}
.article-lang-switch button,
.article-theme-switch {
  min-width: 34px;
  min-height: 32px;
  padding: 5px 8px;
  border: 0;
  border-radius: 4px;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: .78rem;
  font-weight: 900;
  cursor: pointer;
}
.article-lang-switch button.active {
  color: #062116;
  background: #6add94;
}
.article-theme-switch {
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--soft);
}
.article-theme-switch:hover { border-color: var(--green); }

.article-hero {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(115deg, var(--soft) 0 58%, #e8f3ef 58% 100%);
}
html.dark .article-hero { background: linear-gradient(115deg, #0d1d17 0 58%, #102922 58% 100%); }
.hero-inner {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 56px 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, .82fr);
  align-items: center;
  gap: 52px;
}
.eyebrow { margin: 0 0 12px; color: var(--teal); font-size: .82rem; font-weight: 900; }
h1, h2, h3 { margin-top: 0; line-height: 1.35; }
h1 { margin-bottom: 18px; font-size: 2.65rem; }
h2 { margin-bottom: 14px; font-size: 1.65rem; }
h3 { margin-bottom: 8px; font-size: 1.15rem; }
.hero-lead { max-width: 720px; margin: 0 0 18px; color: var(--muted); font-size: 1.12rem; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 20px; color: var(--muted); font-size: .86rem; }
.hero-figure { margin: 0; }
.hero-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid #c9d7d0;
  border-radius: 8px;
  box-shadow: 0 18px 44px rgba(10, 44, 33, .16);
}
.hero-figure figcaption { margin-top: 8px; color: var(--muted); font-size: .82rem; }
html.dark .hero-figure img { border-color: var(--line); box-shadow: 0 18px 44px rgba(0,0,0,.32); }

.wyt-ad-slot {
  width: min(var(--max), calc(100% - 40px));
  min-height: 0;
  margin: 24px auto;
}
.wyt-ad-slot[hidden] { display: none; }

.article-layout {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 52px 0 76px;
  display: grid;
  grid-template-columns: 220px minmax(0, 760px);
  justify-content: center;
  gap: 56px;
}
.toc { position: sticky; top: 96px; align-self: start; }
.toc strong { display: block; margin-bottom: 10px; font-size: .9rem; }
.toc a {
  display: block;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: .87rem;
  line-height: 1.5;
  text-decoration: none;
}
.toc a:hover { color: var(--green); }
.guide-body > p:first-of-type { font-size: 1.08rem; }
.guide-body section { margin: 0 0 46px; scroll-margin-top: 92px; }
.guide-body p { margin: 0 0 18px; }
.guide-body ul, .guide-body ol { margin: 0 0 20px; padding-left: 1.35rem; }
.guide-body li { margin-bottom: 9px; }
.guide-body code {
  padding: 2px 6px;
  border: 1px solid #cbd9d2;
  border-radius: 4px;
  color: #064b2f;
  background: #edf7f1;
  font-family: Consolas, "Courier New", monospace;
  font-size: .94em;
  overflow-wrap: anywhere;
}
html.dark .guide-body code {
  border-color: #35604d;
  color: #a4edbd;
  background: #10271d;
}
.note, .warning {
  margin: 24px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--teal);
  background: #eef7f8;
}
.warning { border-left-color: var(--amber); background: #fff8ea; }
html.dark .note { background: #0d2828; }
html.dark .warning { background: #2a2111; }
.note strong, .warning strong { display: block; margin-bottom: 4px; }
.article-verification {
  margin: 32px 0 46px;
  padding: 24px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--green);
  border-radius: 8px;
  background: var(--soft);
}
.article-verification h2 { margin-bottom: 12px; font-size: 1.35rem; }
.article-verification p { margin-bottom: 12px; }
.article-verification ul { margin-bottom: 12px; }
.article-verification .verification-meta {
  color: var(--muted);
  font-size: .9rem;
}
.article-verification a { font-weight: 800; }
.step-list { counter-reset: steps; padding: 0; list-style: none; }
.step-list > li {
  position: relative;
  min-height: 52px;
  padding: 0 0 24px 58px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}
.step-list > li::before {
  counter-increment: steps;
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--green);
  font-weight: 900;
}
.step-list h3 { margin-bottom: 6px; }
.step-list p { margin-bottom: 8px; }
.check-table { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: .94rem; }
.check-table th, .check-table td { padding: 12px 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.check-table th { background: var(--soft); }
.proof-image { margin: 28px 0; }
.proof-image img { display: block; width: 100%; border: 1px solid var(--line); border-radius: 8px; }
.proof-image figcaption { margin-top: 8px; color: var(--muted); font-size: .82rem; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { padding: 15px 0; cursor: pointer; font-weight: 800; }
.faq details p { padding: 0 0 16px; color: var(--muted); }
.related-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.related-links a {
  min-height: 86px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-weight: 800;
  line-height: 1.55;
  text-decoration: none;
}
.related-links a:hover { border-color: var(--green); color: var(--green); }
.article-cta {
  margin-top: 44px;
  padding: 28px;
  color: #fff;
  background: var(--night);
  border-left: 5px solid #38bf7a;
}
.article-cta h2 { margin-bottom: 8px; }
.article-cta p { color: #d7e7df; }
.article-cta a {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 6px;
  color: #072116;
  background: #6add94;
  font-weight: 900;
  text-decoration: none;
}
.article-cta a:hover { color: #072116; background: #8aeba9; }

.site-footer { padding: 34px 0; color: #c5d2cd; background: var(--night); }
.footer-inner {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
}
.site-footer a { color: #d5eee2; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px 18px; }

@media (max-width: 900px) {
  .nav a:not(.nav-action) { display: none; }
  .hero-inner { grid-template-columns: 1fr; padding: 38px 0; gap: 28px; }
  h1 { font-size: 2.05rem; }
  .article-layout { grid-template-columns: minmax(0, 1fr); gap: 24px; padding-top: 34px; }
  .toc, .guide-body { min-width: 0; }
  .toc { position: static; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
  .toc a { display: inline-block; margin-right: 16px; border: 0; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .header-inner, .hero-inner, .article-layout, .footer-inner, .wyt-ad-slot { width: min(calc(100% - 28px), var(--max)); }
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.4rem; }
  .hero-lead { font-size: 1rem; }
  .related-links { grid-template-columns: 1fr; }
  .check-table { display: block; width: 100%; max-width: 100%; overflow-x: auto; }
  .article-cta { padding: 22px 18px; }
  .article-ui-header .header-inner { gap: 10px; }
  .article-ui-header .brand span { display: none; }
  .article-ui-header .nav { gap: 8px; }
  .article-ui-header .nav .nav-action { padding: 7px 9px; font-size: .78rem; }
  .article-controls { gap: 5px; }
  .article-lang-switch button,
  .article-theme-switch { min-width: 30px; min-height: 30px; padding: 4px 6px; }
}